64250-mt----distributed Database Systems

NR

Code No: 64250/MT

M.Tech. – II Semester Regular Examinations, September, 2008 DISTRIBUTED DATABASE SYSTEMS (Web Technologies) Time: 3hours

Max. Marks:60 Answer any FIVE questions All questions carry equal marks ---

1.a) b)

Briefly explain about object relational databases and active databases. Discuss about mobile database processing.

2.a) b)

Discuss about fragment allocation problem. Discuss about an allocation technique that minimize the total cost of processing.

3.

Discuss about the strategies for designing a distributed relational database.

4.a) b)

Explain the reference architecture of client/server systems. Explain the architecture of cluster data bases.

5.a) b)

Explain about the steps of query decomposition. Discuss about various reduction techniques that generate simpler and optimized queries.

6.a) b)

What is a WFG? Explain its use in deadlock management. Discuss about deadlock detection and resolution approach.

7.a)

Distinguish between semantic heterogenity and structural heterogenity. Explain how CORBA is helpful for database interoperability.

b) 8.a) b)

Describe the architectures that support database access in the web. Distinguish between pull based and push based approaches for data delivery. x-x-x